And these are the names of the sons of Israel: Although [God] counted them in their lifetime by their names (Gen. 46:8-27), He counted them again after their death, to let us know how precious they are [to Him], because they were likened to the stars, which He takes out [From beyond the horizon] and brings in by number and by name, as it is said: who takes out their host by number; all of them He calls by name (Isa. 40:26). [From Tanchuma Buber, Shemot 2; Exod. Rabbah 1:3]

and Joseph, [who] was in Egypt: Now were not he and his sons included in the seventy? What then does this teach us? Did we not know that he was in Egypt? But [this clause comes] to inform you of Joseph’s righteousness. He, the Joseph who tended his father’s flocks, is the same Joseph who was in Egypt and became a king, and he retained his righteousness. [From Sifrei, Ha’azinu 334]

A new king arose: [There is a controversy between] Rav and Samuel. One says: He was really new, and the other one says: His decrees were new. [From Sotah 11a, Exod. Rabbah 1:8] Since the Torah does not say: The king of Egypt died, and a new king arose, it implies that the old king was still alive, only that his policies had changed, and he acted like a new king. [Rashi on Sotah 11a]

ויקם מלך חדש: רב ושמואל חד אמר חדש ממש. וחד אמר, שנתחדשו גזרותיו:

and who did not know: [means that] he acted as if he did not know about him.

אשר לא ידע: עשה עצמו כאלו לא ידע:

9He said to his people, "Behold, the people of the children of Israel are more numerous and stronger than we are.

let us deal shrewdly with them: With the people [of Israel]. Let us act shrewdly regarding what to do to them. Our Rabbis, however, interpreted [that Pharaoh said], Let us deal shrewdly with the Savior of Israel [thus interpreting לוֹ as to him] by afflicting them [to die] with water, for He has already sworn that He would not bring a flood to the world. (But they [the Egyptians] did not understand that upon the whole world He would not bring [a flood] but He would bring it upon one nation In an old Rashi manuscript.) from Sotah 11a]

and depart from the land: against our will. Our Rabbis, however, interpreted [i. e., depicted Pharaoh] as a person who curses himself but ascribes his curse to others. And it is as if it were written: and we will depart from the land, and they will take possession of it. [From Sotah 11a]

tax collectors: Heb. שָׂרֵי מִסִּים, lit., tax officers. מִסִּים denotes an expression of a tax (מַס), [so מִסִּים denotes] officers who collect the tax from them. Now what was the tax? That they build store cities for Pharaoh.

מסים: לשון מס, שרים שגובין מהם המס. ומהו המס, שיבנו ערי מסכנות לפרעה:

to afflict them with their burdens: [I.e., with the burdens] of the Egyptians.

למען ענתו בסבלתם: של מצרים:

store cities: Heb. מִסְכְּנֹתעָרֵי. As the Targum renders: קִרְוֵי בֵיתאוֹצָרָא, cities of storehouses], and similarly, Go, come to this treasurer (הַסּוֹכֵן) (Isa. 22:15), to the treasurer appointed over the storehouses. [From Exod. Rabbah 1:10]

so did they multiply and so did they gain strength: Heb. כֵּן יִרְבֶּה וְכֵן יִפְרֹץ, lit., so will they multiply and so will they gain strength. [It means, however,] so did they multiply and so did they gain strength. Its midrashic interpretation is, however: The Holy Spirit says this: You [Pharaoh] say, Lest they multiply, but I say, So will they multiply. [From Sotah 11a]

and they were disgusted: They were disgusted with their lives. (Others explain: And the Egyptians were disgusted with themselves, and it is easy to understand why.) Our Rabbis, however, interpreted it to mean that they [the Israelites] were like thorns (כקוצים) in their eyes -[from Sotah 11a].

ויקצו: קצו בחייהם. ורבותינו דרשו כקוצים היו בעיניהם:

13So the Egyptians enslaved the children of Israel with back breaking labor.

יגוַיַּֽעֲבִ֧דוּ מִצְרַ֛יִם אֶת־בְּנֵ֥י יִשְׂרָאֵ֖ל בְּפָֽרֶךְ:

with back-breaking labor: Heb. בְּפָרֶ. With hard labor that crushes the body and breaks it.

בפרך: בעבודה קשה המפרכת את הגוף ומשברתו:

14And they embittered their lives with hard labor, with clay and with bricks and with all kinds of labor in the fields, all their work that they worked with them with back breaking labor.

to the midwives: Heb. לַמְיַלְּדֹת. This is an expression similar מוֹלִידוֹת, [meaning] causing to give birth, but there is a light form and there is a heavy form, similar to שׁוֹבֵר, breaks, and מְשַׁבֵּר, shatters, דּוֹבֵר, says, and מְדַבֵּר, speaks. So are מוֹלִיד and מְיַלֵּד. Rashi classifies the Hebrew conjugations, those that have a dagesh in the second root letter, and those that do not. Of the seven conjugations, three have a dagesh, and four do not. Since it is more difficult to pronounce the letters with the dagesh, those conjugations are referred to as the heavy form, and those without the dagesh are referred to as the light (קַלִּים) [Sefer Hazikkaron]

Shifrah: This was Jochebed, [called Shifrah] because she beautified [מְשַׁפֶּרֶת] the newborn infant. [From Sotah 11b]

שפרה: זו יוכבד על שם שמשפרת את הולד:

Puah: This was Miriam, [called Puah] because she cried (פּוֹעָה) and talked and cooed to the newborn infant in the manner of women who soothe a crying infant. פּוֹעָה is an expression of crying out, similar to “Like a travailing woman will I cry (אֶפְעֶה) " (Isa. 42:14). Rashi on Sotah 11b explains that she played with the infant to soothe and amuse him.

When you deliver: Heb. בְּיַלְדְכֶן, like בְּהוֹלִידְכֶן. See Rashi on preceding verse.

בילדכן: כמו בהולידכן:

on the birthstool: Heb. הָאָבְנָיִם, the seat of the woman in childbirth, but elsewhere (Isa. 37:3) it is called מַשְׁבֵּר Similar to this, [we find] who does work on the אָבְנָיִם (Jer. 18:3), the seat [i.e., place] of the tools of a potter. (Compare commentary digest in Judaica Press Jer. 18.3.)

but they enabled the boys to live: They provided water and food for them. [From Sotah 11b] [The word וַתְּחַיֶּיןָ is found in verse 17 and again in verse 18.] The first is translated וְקַיָּמָא, and they enabled to live, and the second וְקַיֵּמְתִּין, and you enabled to live, because in Hebrew, for the feminine plural, this word and others like it are used as the third person past tense and the second person past tense, e.g. “And they said (וַתֹּאמַרְןָ), ‘An Egyptian man מִצְרִי) (אִישׁ ’” (Exod. 2:19), the past tense, like וַיֹּאמְרוּ for the masculine plural; you have spoken (וַתְּדַבֵּרְנָה) with your בְּפִיכֶם (Jer. 44:25), an expression like וַתְּדַבֵּרְנָה, the equivalent of דִבַּרְךְתֶּם for the masculine plural. Similarly, You have profaned (וַתְּחַלֶּלְנָה) Me before My people (Ezek. 13:19), the past tense, an expression like חִלַּלְךְתֶּם, the equivalent of וַתְּחַלּלוּ for the masculine plural. If it was necessary to supply the infants with food, Ohr Hachayim asks why the midwives did not do it prior to Pharaoh’s decree. He answers that the Torah means that despite Pharaoh’s decree, the midwives continued their previous practice, that is, supplying needy children with nourishment. He suggests further that they particularly sustained the male children lest one die and they be suspected of being responsible for his death. Rashi explains that in the Hebrew, there is a conversive vav, (turning past into future and future into past). Therefore, since the future forms of the feminine plural, both in the second person and in the third person, are identical, the same is true for the past forms with the conversive vav. [Mizrachi] In Aramaic, however, since there is no conversive vav, the two past forms are different. [Divrei David]